JPH0349188A - Emergency lamp device - Google Patents

Abstract

PURPOSE:To smoothly start lighting with no flickering of a fluorescent lamp because of high frequency regardless of the power source frequency and make a whole device lightweight by lighting the fluorescent lamp with an inverter ordinarily and at emergency. CONSTITUTION:The commercial power source AC is rectified into DC by a rectifying circuit 2 to charge a battery 3 ordinarily. A power failure detecting circuit 4 detects the power failure state of the power source AC with the output of the circuit 2. When the power source AC is interrupted by the occurrence of a fire or the like, an emergency detecting circuit 5 detects it, a switch 7 is turned on, and an emergency inverter 6 is driven by the battery 3 to light a fluorescent lamp 8. The power source AC is converted into the DC voltage by another rectifying circuit 10, an emergency inverter 12 is driven via a switching element 11 to light the fluorescent lamp 8, and the element 11 is turned off when the circuit 4 detects the power failure. The fluorescent lamp 8 is invariably lighted by an inverter, and no stabilizer or glow lamp is required.

Description

DETAILED DESCRIPTION OF THE INVENTION (AL Industrial Field of Application) This invention normally uses commercial power to turn on a fluorescent lamp,
The present invention relates to an emergency light device that lights up the fluorescent light by driving an emergency inverter using a buffer battery during a power outage of the commercial power supply.

Conventional technology Conventional emergency lighting systems use fluorescent lights with ballasts and glow lamps during normal times.

(Problems to be solved by the C1 invention) However, it is difficult to reduce the weight of a device that uses a ballast and a glow lamp to turn on a fluorescent lamp under normal conditions, flickers, and generates a large amount of heat when starting up. There was also an inconvenience that the lighting was not smooth.

An object of the present invention is to provide an emergency lighting device that eliminates the above-mentioned inconvenience by lighting a fluorescent light using an inverter even during normal times.

(Means for solving d1 issues FIG. 1 is a block diagram of an emergency lighting device according to the present invention.

The commercial power AC has a rectifier circuit 2 consisting of a diode bridge.
The current is converted to direct current, and the battery 3 is charged under normal conditions. Further, a power outage detection circuit 4 detects a power outage state of the commercial power supply AC from the output of the rectifier circuit 2. The emergency detection circuit 5, which is provided separately from the emergency lighting device, detects when the commercial power supply AC is out of power in the event of a fire, etc., and outputs an emergency signal in the event of an emergency to connect the battery 3 and the emergency inverter 6. Turn on the switch 7 provided between the

When this switch 7 is turned on, the emergency inverter 6 is subsequently driven by the battery 3.Since the fluorescent lamp 8 is connected as a load to the output side of the emergency inverter 6, in an emergency, this fluorescent lamp The light 8 is turned on by the emergency inverter 6. On the other hand, the commercial room HAC is converted into a DC voltage by another rectifier circuit 10, and is supplied to a normal inverter 12 via a switching element 11. Further, this switching element 11 is turned off when the power failure detection circuit 4 detects a power failure state, and is normally turned on.

When the switching element 11 is on, the inverter 12 for normal operation operates, so the fluorescent lamp 8 is lit by the output of the inverter 12 for normal operation.

(81 action) In the above emergency lighting device, the fluorescent lamp 8 is normally turned on by the normal inverter 12, and in an emergency, the fluorescent lamp 8 is turned on by the emergency inverter 6. Therefore, the fluorescent lamp 8 is normally turned on by the emergency inverter 6. Since the lights are turned on by an inverter even in times of emergency, there is no flickering and the start-up is extremely smooth.

In addition, since the circuit configuration does not use a conventional ballast or glow lamp to light the fluorescent lamp 8, the entire device is lighter, generates less heat, and does not depend on the power frequency of 51) Hz or 60Hz. Stable lighting is guaranteed.

(fl Embodiment FIG. 2 is a circuit diagram of the first embodiment of the present invention. Commercial power supply AC is stepped down to an appropriate voltage by a step-down transformer 20, and a diode bridge 21 and a smoothing capacitor 2
2 is converted to DC voltage, diode 23, current reducing resistor 2
4 to charge the battery 25. The voltage of the pantry 25 is applied to the emergency inverter 27 through a switch 26 that is turned on when an emergency signal arrives. The power failure detection circuit is composed of a series circuit of an LED 2B connected in parallel to the smoothing capacitor 22 and a resistor 29. This LED 28 is connected to a phototransistor 42 which will be described later.
constitutes a photocoupler, and turns on the phototransistor 42 when the LED 28 is on.

Further, the commercial power AC is converted into a DC voltage by a diode bridge 40 and a smoothing capacitor 41, and is applied to a known push-pull inverter 43 including two transistors 44 and 45 connected in push-pull through a phototransistor 42 of the photocoupler. be done.

Further, each high frequency output of the emergency inverter 27 and the push-pull inverter 43 is applied to electrodes at both ends of the fluorescent lamp 52 via a high frequency transformer 50 and a capacitor 51.

In normal times when no emergency signal is generated in the above configuration, the push-pull inverter 43 is driven because the phototransistor 42 of the photocoupler is on. Further, the switch 26 is in an off state. therefore,
In normal times, the fluorescent lamp 52 is turned on by the push-pull inverter 43, and the battery 25 is charged by the commercial power supply AC. On the other hand, when an emergency signal is generated, the LED 28 of the photocoupler is turned off, so the photocoupler 42 is turned off, and the push-pull inverter 4 for the commercial power supply circuit is turned off.
Since the circuit No. 3 is disconnected and the switch 26 is turned on, the emergency inverter 27 is driven by the battery 25. Therefore, at this time, the fluorescent lamp 52 is turned on by the output of the emergency inverter 27.

As mentioned above, the fluorescent light 52 is turned on both in normal times and in emergencies.

FIG. 3 shows another embodiment of the invention.

In this embodiment, the inverter is a half-bridge inverter.

Commercial power AC is converted into a DC voltage by a diode bridge 50 and a smoothing capacitor 51, and this voltage is applied to a known half-bridge inverter 54 including half-bridge connected transistors 52 and 53. The high frequency output of the half-bridge nozzle inverter 54 passes through a phototriac 55 of a photocoupler and is applied to a fluorescent lamp 56.

On the other hand, a commercial source AC is stepped down to an appropriate voltage by a step-down transformer 57, rectified by a diode 58, and charged to a buffer battery 59. In addition, the commercial power AC has a rectifier circuit 60
It is rectified by , and lights up the LED 61 of the photocoupler. 1. Normally when the commercial power supply AC is not out of power. Ko0L
Before the ED 61 lights up, the phototriac 55 is turned on, and the high frequency output of the half bridge inverter 54 is applied to the fluorescent lamp 56.

The voltage of the battery 59 is applied to an emergency inverter 63 through a switch 62 that is turned on when an emergency signal arrives, and the high frequency output of the emergency inverter 63 is applied to the fluorescent lamp 56 through a high frequency transformer 64.

With the above configuration, the fluorescent lamp 56 is driven by the half-bridge inverter 54 because the thyristor 55 is in an on state due to the operation of the photocoupler when the commercial power AC is normally supplied. Further, since the emergency signal is not output, the emergency inverter 63 is not driven.

On the other hand, when the commercial power supply fails, an emergency signal is generated, so the switch 62 is turned on and the emergency inverter 63 is driven by the battery 59.

This inverter output is then applied to the fluorescent lamp 56. Also, at this time, the thyristor 5 in the photocoupler
5 is off, the output of the emergency inverter 63 is prevented from leaking to the half-bridge inverter 54 side.

Effects of the fg1 invention As described above, according to the present invention, since the fluorescent lamp is lit by the inverter both in normal times and in emergency situations,
The overall weight of the device can be reduced, it generates less heat, and it uses high-frequency lighting (Figure 1).

[Brief explanation of drawings]

FIG. 1 shows a configuration diagram of an emergency light device according to the present invention, and FIGS. 2 and 3 show embodiments of the same emergency light device. -Battery, 4-Power failure detection circuit, 1-Emergency inverter, -Fluorescent light, 11-Switching element. 2-Inverter for normal use.

Claims (3)

[Claims] (1) An emergency lighting device that lights a fluorescent light using a commercial power source during normal times, and drives an emergency inverter using a battery to light the fluorescent light during a power outage of the commercial power source, the fluorescent light being powered by the commercial power source. Install an inverter for normal use,
a power outage detection unit that normally lights up the fluorescent light using the inverter and detects a power outage state of the commercial power supply;
An emergency light comprising a switching element connected in series in the circuit of the normal inverter, and a circuit that turns off the switching element and stops the operation of the normal inverter when a power outage is detected. Device. (2) The emergency lighting device according to claim 1, wherein the normal inverter is a push-pull inverter, and the switching element is connected in series to the input side of the inverter. (3) The emergency lighting device according to claim 1, wherein the normal inverter is a half bridge inverter.